EP1714712B1 - Device and method for applying a treatment agent to a surface - Google Patents

Device and method for applying a treatment agent to a surface Download PDF

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Publication number
EP1714712B1
EP1714712B1 EP05008725A EP05008725A EP1714712B1 EP 1714712 B1 EP1714712 B1 EP 1714712B1 EP 05008725 A EP05008725 A EP 05008725A EP 05008725 A EP05008725 A EP 05008725A EP 1714712 B1 EP1714712 B1 EP 1714712B1
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EP
European Patent Office
Prior art keywords
agent
patch
treatment agent
agents
hydrogel
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Revoked
Application number
EP05008725A
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German (de)
English (en)
French (fr)
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EP1714712A1 (en
Inventor
Victoria Heather c/o Reckitt Benckiser Ltd. Cobb
Coreen Jane c/o Reckitt Benckiser Ltd. Iliffe
Margaret Louise c/o Reckitt Benckiser Ltd. Barlow
Jonathan Mark Law
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Reckitt Benckiser UK Ltd
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Reckitt Benckiser UK Ltd
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Application filed by Reckitt Benckiser UK Ltd filed Critical Reckitt Benckiser UK Ltd
Priority to AT05008725T priority Critical patent/ATE422973T1/de
Priority to ES05008725T priority patent/ES2321003T3/es
Priority to EP05008725A priority patent/EP1714712B1/en
Priority to DE602005012802T priority patent/DE602005012802D1/de
Priority to PCT/GB2006/001444 priority patent/WO2006111754A1/en
Priority to US11/911,443 priority patent/US20090038082A1/en
Publication of EP1714712A1 publication Critical patent/EP1714712A1/en
Publication of EP1714712B1 publication Critical patent/EP1714712B1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
    • B08B3/04—Cleaning involving contact with liquid
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B1/00—Cleaning by methods involving the use of tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
    • B08B3/04—Cleaning involving contact with liquid
    • B08B3/10—Cleaning involving contact with liquid with additional treatment of the liquid or of the object being cleaned, e.g. by heat, by electricity or by vibration
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06L—DRY-CLEANING, WASHING OR BLEACHING FIBRES, FILAMENTS, THREADS, YARNS, FABRICS, FEATHERS OR MADE-UP FIBROUS GOODS; BLEACHING LEATHER OR FURS
    • D06L1/00—Dry-cleaning or washing fibres, filaments, threads, yarns, fabrics, feathers or made-up fibrous goods
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06L—DRY-CLEANING, WASHING OR BLEACHING FIBRES, FILAMENTS, THREADS, YARNS, FABRICS, FEATHERS OR MADE-UP FIBROUS GOODS; BLEACHING LEATHER OR FURS
    • D06L4/00—Bleaching fibres, filaments, threads, yarns, fabrics, feathers or made-up fibrous goods; Bleaching leather or furs
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06L—DRY-CLEANING, WASHING OR BLEACHING FIBRES, FILAMENTS, THREADS, YARNS, FABRICS, FEATHERS OR MADE-UP FIBROUS GOODS; BLEACHING LEATHER OR FURS
    • D06L4/00—Bleaching fibres, filaments, threads, yarns, fabrics, feathers or made-up fibrous goods; Bleaching leather or furs
    • D06L4/10—Bleaching fibres, filaments, threads, yarns, fabrics, feathers or made-up fibrous goods; Bleaching leather or furs using agents which develop oxygen

Definitions

  • the present invention relates to a device for applying a treatment agent to a surface, particularly to a textile surface, to remove stains; and to an associated method.
  • WO 99/04082 and WO 02/102957 discloses textile treatment compositions comprising a patch with a water-impervious backing made of a polymer sheet to which is attached a hydrogel containing a surfactant treatment fluid.
  • the present invention concerns the delivery of agents to treat a surface, for example to form a stain-removing gel on the surface, according to the claims.
  • an apparatus for treating a surface comprising a device for delivery of a treatment agent to the surface and pressing means for pressing the treatment agent against the surface.
  • the device preferably further comprises actuator means to deliver the treatment agent to the surface.
  • the device comprises actuator means which, when operated, delivers the treatment agent to the surface and subsequently causes the pressing means to press the treatment agent against the surface.
  • the term “against the surface” in this specification we mean to include embodiments in which the treatment agent is pressed against a hard surface, and embodiments in which the treatment agent is pressed against a soft surface, for example a cellular or fibrous surface, into which there may be some penetration by the treatment agent.
  • the pressing means may be a piston adapted to descend onto the treatment agent, generally perpendicularly to the surface.
  • the pressing means may be a flap hinged along one edge, and which is rocked or pivoted down onto the treatment agent, on the surface being treated.
  • the pressing means has a pressing surface which in use contacts the treatment agent, and which is adapted not to pick up the treatment agent, and preferably to release or repel it.
  • the pressing surface is coated with a release agent.
  • the apparatus comprising defining means which is adapted for engagement with the surface, and which delimits the area of the surface which is thus treated.
  • the defining means may be integral with the device or may be provided separately. When provided separately, the device may be provided with a means of storing or retaining the defining means.
  • the defining means comprises a wall or barrier which is placed, in use, on to the surface. It thus functions as a frame or mask, retaining the agent within the barrier so that it does not extend beyond the area of the surface which needs to be treated. In this way, treatment agent is not wasted, which has obvious cost and environmental benefits.
  • the agent may be provided as a solid, a liquid or a gel. Preferably it is a liquid, more preferably an aqueous liquid.
  • liquid herein is meant that a flowable material having a viscosity of 100,000 mPa.s or less at a shear rate of 1 s -1 at 25°C.
  • the agent undergoes a physical or chemical change.
  • This may be a decomposition or oxidation reaction induced by exposure to air, for example.
  • the agent undergoes a change of state and/or an increase in viscosity. This may be induced by a chemical or physical change which occurs upon exposure to air, or could be due, for example to evaporation of a volatile component.
  • the agent forms a gel within the defining means.
  • the apparatus comprises a first chamber containing a first agent and a second chamber containing a second agent, the first and second agents together forming, in use, the treatment agent.
  • the device may be provided with a common outlet zone from which the first and second agents can be delivered.
  • a common outlet zone is preferred as this allows the first and second agents to be delivered to a single locus without the need to alter the position of the device.
  • a common outlet zone is preferably covered by a closure, for storage purposes.
  • the closure is removed when the device is to be used.
  • the closure is attached to the device, for example by a hinge or web.
  • the defining means may be integral with the device.
  • the defining means is provided at the terminus of the common outlet zone.
  • the terminus of the common outlet zone is the part through which the agents exit the device; it is the end opposite to where the chambers housing the agents are located.
  • the terminus of the common outlet zone may thus be provided with a boundary wall or barrier which comprises the defining means.
  • the actuator means is preferably adapted to deliver the second agent only when the delivery of the first agent has ended.
  • the actuator means preferably causes the pressing means to press the treatment agent against the surface only when the delivery of the second agent has ended.
  • the common outlet zone is preferably the terminus of a cylinder in which the piston is slidable.
  • the actuator means could comprise a first actuator for discharging the first agent and a second actuator for discharging the second agent. However in preferred embodiments of the invention there is a common actuator.
  • a common actuator may be pressed and thereby expel the first agent, and subsequently the second agent. This may happen, when the agents are liquids, by sequential action of pistons which are displaced from each other, the first piston expelling the first liquid and the second piston subsequently expelling the second liquid.
  • the device could also make a third delivery of an agent, to the area of surface to be treated. That delivery could be of a third agent or could be a further delivery of the first or second agent. Preferably when there is a third delivery it is of the first agent.
  • the actuator means is adapted to deliver a predetermined quantity of the first agent.
  • the actuator means is adapted to deliver a predetermined quantity of the second agent, when present.
  • the actuator means When there is common outlet zone for delivery of two agents, the actuator means is preferably aligned with the common outlet zone. Preferably the actuator means is on one side or end of the device and the common outlet zone on the other side or end of the device. It is beneficial that a downward force applied to the actuator means during its operation is conveyed to the common outlet zone in such a way as to minimise torque and/or allow for the possibility in certain preferred embodiments, of one-handed operation.
  • the first and second agents could both be solids, for example particulates which on coming together form a liquid or gel.
  • the first agent could be a solid and the second agent a liquid or gel, the first agent liquefying or dissolving or forming a gel when contacted by the second agent.
  • the first and second agents may both be gels.
  • At least one of the first and second agents is a liquid, preferably an aqueous liquid.
  • first and second agents are both liquids, and most preferably aqueous liquids.
  • the first and second liquids are preferably such that, on coming together, they undergo a change of state and/or an increase in viscosity.
  • they form a solid or gel, most preferably a hydrogel (hereinafter collectively called a "patch").
  • the patch is sufficiently strong that it can be peeled from the surface. The provision of liquids may facilitate good wetting of the surface, whilst the resulting material of increased viscosity allows the patch to be removed from the surface.
  • the stain is preferably removed along with the patch.
  • the first liquid is of viscosity in the range of from 1 to 1,000 mPa.s, preferably of from 1 to 100 mPa.s, at a shear rate of 1 s -1 at 25°C.
  • the second liquid is of viscosity in the range of from 1 to 20,000 mPa.s, more preferably of from 1,000 to 15,000 mPa.s, most preferably of from 5,000 to 10,000 mPa.s, at a shear rate of 1 s -1 at 25°C.
  • a patch as described may also be formed following the delivery of a single agent to a surface.
  • a change of state may be induced by, for example, exposure to air.
  • the dimensions of the patch are determined by the defining means.
  • the defining means is suitably left on the surface until the patch has developed.
  • the defining means may then be removed to leave a patch which can be peeled off by the user.
  • the defining means may be used to aid the removal of the patch.
  • the patch may become adhered to the walls of the defining means.
  • the area limited by the defining means is at least 4 cm 2 , more preferably at least 6 cm 2 .
  • the area does not exceed 40 cm 2 , and preferably does not exceed 30 cm 2 .
  • the defining means is circular, preferably of diameter in the range of from 2 to 8 cm, more preferably of from 3 to 6 cm.
  • the defining means preferably comprises an annular wall or body made from a plastics material, for example a polyalkylene, but defining means having other shapes are not excluded.
  • the defining means is not more than 3 mm thick, more preferably not more than 2 mm thick, and most preferably not more than 1 mm thick.
  • the defining means is flexible, so as to aid removal of a patch by a progressive action, for example a peeling action.
  • Suitable materials for the defining means include card, plastics sheet materials (e.g. films) and fabrics.
  • the outlets or common outlet zone of the device preferably is/are slightly larger than the opening of the defining means.
  • the device is in contact with the upper face of the defining means.
  • the patch may thereby have an outer rim in contact with the upper face of the defining means, around its opening. This additional contact with the defining means may aid removal of the patch from the material.
  • the defining means may comprise support elements, e.g. strands or threads, which extend across the opening in the defining means. These support elements are preferably aligned with each other. There may additionally be further support elements transverse to these, to form a net-type or mesh structure.
  • support elements When the patch forms, for example during the transformation of two liquids into a gel, such support elements become embodied within the patch. This supports the patch and enables it to be removed from the surface more easily.
  • Such support elements may be provided on a defining means which is independent from the device or may be provided across the terminus of a common outlet zone, where this is the defining means.
  • surface we include both hard and soft surfaces.
  • hard surface we include ceramics, glass, stone, plastics, marble, metal and/or wood surfaces, such as, in the household environment for example, bathroom and kitchen hard surfaces such as sinks, bowls, toilets, panels, tiles, worktops, dishes, and the like.
  • Hard surfaces are non-porous to water, by which it is meant that a hard surface, on contact with water for 5 minutes, takes up less than 5 mg of water per cm 2 .
  • soft surface we include textiles, clothing, carpets, curtains, upholstery, textile or fabric covered articles, and the like.
  • Soft surfaces are porous to water, by which it is meant that a hard surface, on contact with water for 5 minutes, takes up 5 mg or of water per cm 2 .
  • the surface is a textile surface, and the device is to be used for removing stains therefrom.
  • the first liquid is able to achieve good wetting of its fibres, and preferably penetrate the textile surface.
  • a second liquid is provided this is of higher viscosity, so that it does not penetrate the textile surface and wet its fibres to the same degree. Rather, it sits as a layer on the textile surface. Nevertheless it mixes with the first liquid and the liquids preferably form a patch of higher viscosity than either of the first or second liquids.
  • the first of which is a hydrogel-precursor and the second of which is a cross-linking agent.
  • the paragraphs which follow relate to such preferred embodiments.
  • cross-linking agent and hydrogel-precursor may be applied sequentially in either order: cross-linking agent first or hydrogel-precursor agent first.
  • first agent applied to the surface is the cross-linking agent and the second agent applied is the hydrogel-precursor.
  • a third application may be made, preferably a repeat application of the first agent applied.
  • the cross-linking agent cross-links the hydrogel-precursor polymeric material of the hydrogel-precursor as part of the patch-forming process, leading to the formation of a hydrogel patch. Therefore, a requirement for this cross-linking agent is that it comprises a species capable of cross-linking the other agent (preferably polymer material of the other agent) as part of the patch-forming process.
  • hydrogel a natural or synthetic polymeric material which possesses the ability to swell in water.
  • the hydrogel may be water-insoluble or water-soluble; preferably it has a solubility in water of less than 1 g/dm 3 .
  • hydrogel-precursor is meant a material which can be cross-linked in order to form a hydrogel. Natural hydrogel precursors are suitable for the invention, such as alginates and other polysaccharides with free carboxylic acid groups.
  • the hydrogel-precursor is a hydrophilic homopolymer or copolymer of acrylic or methacrylic acid, or a salt thereof; or a carboxylated cellulose derivative.
  • the polymer once formed into a hydrogel, is cross-linked to a relatively low degree and but for the cross-linking would be essentially water-soluble.
  • the polymer may include in its structure a polysaccharide such as starch, for example in a graft copolymer.
  • the cross-linking component suitably comprises metal M 2+ ions (where M is a Group IIA element or any other metallic element capable of exhibiting a +2 oxidation state), more preferably wherein M is a Group IIA element, even more preferably Ca 2+ ions, i.e. this liquid component comprises an M 2+ salt, e.g. a calcium salt. Yet more preferably, this liquid component comprises calcium chloride as the source of Ca 2+ ions.
  • the hydrogel-precursor may be carrageenen, preferably iota-carrageenan, or pectin.
  • carrageenen preferably iota-carrageenan, or pectin.
  • calcium ions are suitable cross-linking agents.
  • Another suitable hydrogel-precursor is chitosan, which is soluble in acidic or protonated form, and gels in the presence of alkali. If the hydrogel-precursor component comprises chitosan, the cross-linking agent should comprise an alkali, preferably sodium hydroxide.
  • the hydrogel-precursor comprises alginic acid or an alginate, where an alginate is a salt of alginic acid, even more preferably, a sodium alginate.
  • alginate is used to refer to either alginic acid or a water-soluble salt thereof, such as a sodium salt.
  • Alginic acid or alginates may be found in and isolated from various organisms, in particular from algae belonging to the order Phaeophyceae and soil bacteria such as Azotobacter vinelandii and Azotobacter crococcum and from several strains of Pseudomonas bacteria.
  • Common algal sources of algins include Laminaria digitata, Ecklonia maxima, Macrocystis pyrifera, Lessonia nigrescens, Ascophyllum nodosum, Laminaria japonica, Durvillea antartica, Durvillea potatorum and, especially, Laminaria hyperborea.
  • Alginic acid is a linear hetero-polysaccharide comprising units of ⁇ -D-mannuronic acid and ⁇ -L-guluronic acid.
  • Alginic acid may comprise homopolymeric sequences of mannuronic acid, homopolymeric sequences of guluronic acid, and mixed sequences of mannuronic acid and guluronic acid units.
  • Salts of alginic acid used in the method of the present invention may include alkali metal salts, for example sodium and potassium salts, and ammonium and alkanolamine salts. Alkali metal salts are of particular interest.
  • algins or “alginates” as used herein include alginic acid and salts of alginic acid, irrespective of the relative proportion of mannuronic and guluronic units, and is intended to include glycolated or alkoxylated derivatives, especially those derivatised with propylene glycol. However, preferred compounds are not alkoxylated or glycolated. Guluronic acid-rich alginic acid and guluronic acid-rich salts of alginic acid are of particular interest, as they are found to improve the mechanical properties of the patch thus formed and hence the ease with which it can be removed.
  • the alginate should have a guluronic (G-block) content of at least 15% of the total alginate weight, more preferably at least 25%, more preferably at least 35%. More preferred alginates have at least 50%, more preferably 55-99%, most preferably 60-80% of guluronic units (by weight of the alginate), the balance being mannuronic units. For guidance on production of algins very high in guluronic units the reader is referred to WO 98/51710 .
  • Suitable alginates for use in the method of the present invention include those in the Protanal range, LF20, GP6650, and XP3499 (Trade Marks; products all available from FMC BioPolymer of Philadelphia, PA 19103, USA).
  • Protanal LF20 is preferred and is a sodium alginate.
  • the agent containing the hydrogel-precursor (preferably an alginate), comprises the hydrogel-precursor in the range 0.1 to 10 wt% compared to the overall weight of that agent, more preferably in the range 0.25 to 5 wt%, most preferably 0.4 to 4 wt%, for example 0.5 wt% to 3 wt%.
  • alginates are, as noted hereinbefore, comprised of mannuronate and guluronate monomers and in order to form a gel, and thus a usable patch in the method of the present invention, the alginate should contain a sufficient level of guluronate monomers in a block to react with metal cations, such as divalent ions (preferably calcium ions) from the other component(s) to form a gel. It is believed that the metal ions essentially "fit" into the guluronate block structure in suitable alginates.
  • metal cations such as divalent ions (preferably calcium ions)
  • the cross-linking agent comprises metal cations, preferably M 2+ cations, most preferably Ca 2+ , cations in the range 0.03 to 5 wt%, more preferably in the range 0.05 to 4 wt%, even more preferably in the range 0.1 to 3 wt%, most preferably in the range 0.2 to 2 wt% (weight of metal cations/cross-linking agent).
  • the preferred weight percentage expressed as weight percent of CaCl 2 .2H 2 O in the cross-linking component is 0.1 to 10 wt% of the overall weight of this component, more preferably 0.5 to 3.5 wt%, even more preferably 0.5 to 3.0 wt%, most preferably 0.8 to 2 wt%.
  • the first agent applied comprises calcium chloride solution
  • the second agent applied comprises a soluble alginate salt, preferably sodium alginate.
  • a further application of calcium chloride solution may then be made, if wished.
  • further components can be in any agent used in the invention. Examples of such components are described below, and may improve still further the effectiveness of embodiments of the invention.
  • any one or more of these components can be added to the first and, when present, second agents as set out hereinafter, or to the third agent when used, in any mutually compatible manner, unless stated otherwise or when their formulations together would decrease the efficacy of one of them, or otherwise be detrimental.
  • a yet further advantage of the present invention is that because the at least two agents are kept separate until the user uses the device, it is possible for mutually incompatible or antagonistic further components to be employed.
  • Optional further compounds may include one or more of the following.
  • a silicone may comprise a silicone oil, preferably a cyclic or linear polydimethylsiloxane preferably having a viscosity at 25°C and at a shear rate of 1 s -1 of from 10 to 10,000 mPa.s.
  • Such silicone oil is suitably in the form of emulsified droplets, preferably in the hydrogel-precursor component of the invention.
  • a suitable level is from 0.1 to 2 wt%, preferably from 0.5 to 1.5 wt% by weight of the patch formed in the method.
  • Suitable surfactants for use in emulsification may be as described below. Alternatively, a silicone-based surfactant may be used.
  • An advantage of the presence of the silicone oil is that it may provide improved peelability for a patch.
  • anti-limescale agents include acids, particularly organic acids (e.g. citric acid), and anti-nucleating polymers, such as polyacrylates.
  • Other relevant acids that may be present include glycolic and sulphamic acids.
  • the amount of acid present for limescale removal is sufficient to provide a pH of 1-7, more preferably 2-7, most preferably 3-6, at the treatment site.
  • Peroxygen bleaching agents may be present in some embodiments (in particular non-aerosol embodiments). Suitable peroxygen bleaching compounds include sodium carbonate peroxyhydrate and equivalent "percarbonate" bleaches, sodium pyrophosphate peroxyhydrate, urea peroxyhydrate, and sodium peroxide. Persulfate bleach (e.g. OXONE (Trade Mark; manufactured commercially by DuPont) can also be used. Perestane or PAP are also suitable bleaches for use with the invention.
  • Bleach activators can also be present. Bleach activators lead to the in situ production in aqueous solution of the peroxy acid corresponding to the bleach activator.
  • activators are disclosed in US Patent 4,915,854, issued April 10, 1990 to Mao et al, and US Patent 4,412,934 .
  • NOBS nonanoyloxybenzene sulfonate
  • TAED tetraacetylethylene diamine
  • the bleach system if present, may suitably be in a said cross-linking component.
  • the bleach system is contained in the component containing a said hydrogel-precursor. It has been found that this gives improved stain removal from soft surfaces compared to that achieved when the bleach is in with the other component.
  • the bleach when present is at a level in the range 0 to 8 wt%, more preferably 1 to 7 wt%, most preferably in the range 2 to 6 wt%, of the agent in which it is provided.
  • the peroxide or peroxide generator is present in the hydrogel-precursor component at a pH from 4 to 6, preferably 4.5 to 5.5. At lower pH the precursor may be unstable. At higher pH the peroxide may dissociate on storage.
  • the pH of the other, cross-linking component is 8 to 10, preferably 8.5 to 9.5. This helps to increase the effectiveness of the peroxide for bleaching when the components are mixed. If the pH of the metal ion-containing agent is too high, the ions may precipitate from solution, especially where Ca 2+ ions are present.
  • Enzymes can be included in the agents herein for a wide variety of fabric laundering purposes, including removal of protein-based, carbohydrate-based, or triglyceride-based stains, for example, and for the prevention of dye transfer, and for fabric restoration.
  • the enzymes to be incorporated include proteases, amylases, lipases, cellulases, and peroxidases, as well as mixtures thereof.
  • Other types of enzymes may also be included. They may be of any suitable origin, such as vegetable, animal, bacterial, fungal and yeast origin. However, their choice is governed by several factors such as pH-activity and/or stability optima, thermostability, stability versus active detergents, builders and so on. In this respect bacterial or fungal enzymes are preferred, such as bacterial amylases and proteases, and fungal cellulases.
  • enzymes if present are in the first or second agent at a level in the range 0.001 to 5 wt%, more preferably 0.01 to 1 wt%, of the agent.
  • Solvents may be present in the first and/or second agent. More preferably, organic solvents, such as glycol ethers, C 1 -C 10 alcohols, C 1 -C 10 hydrocarbons or halohydrocarbons, carbonyl-based solvents such as acetone, and the like, are present, preferably in the component(s) comprising M 2+ ions.
  • the organic solvent if present, should preferably be included in an amount from 5 to 50 wt% of the component.
  • the overall levels of organic solvents should be within the VOC limits of cleaning products and preferably, the maximum level of organic solvent in either or both agent is 8 wt%, more preferably, up to 6 wt%, most preferably up to 4 wt%.
  • Non-limiting examples of surfactants useful herein comprise anionic surfactants such as sarcosides, C 10 -C 20 alkyl benzene sulfonates, C 10 -C 20 alkyl sulfates and ether sulfates or/and nonionic surfactants such as ethoxylated and/or propoxylated fatty acid esters or alcohols.
  • anionic surfactants such as sarcosides, C 10 -C 20 alkyl benzene sulfonates, C 10 -C 20 alkyl sulfates and ether sulfates or/and nonionic surfactants such as ethoxylated and/or propoxylated fatty acid esters or alcohols.
  • anionic and nonionic surfactants are especially useful.
  • Other conventional useful anionic, amphoteric, nonionic or cationic surfactants are listed in standard texts.
  • the surfactant is sodium lauryl sarcosinate, available in 30% form as SURFAC SL3OF (Trade Mark; available from Surfachem Plc, Leeds, UK), and/or sodium lauryl sulfate.
  • SURFAC SL3OF Trade Mark; available from Surfachem Plc, Leeds, UK
  • surfactant(s) if present is/are in the first and/or second agent, at a level in the range 0.01 to 50 wt%, more preferably 0.05 to 20 wt%, most preferably 0.1 to 10 wt%, for example 4 wt%, of the agent.
  • Anionic surfactants are preferred over nonionic or zwitterionic surfactants, in that they give improved peelability of a patch.
  • At least one of the agents used in the present invention comprises at least one surfactant.
  • Sequestrants such as Dequest 2066 (Trade Mark; product available from Solutia Inc., St Louis 6366-6760, USA), EDTA, and Dissolvine EDG (Trade Mark; product available from Akzo Nobel, Gillingham, UK), aid in stain removal and hence are preferably present in one or more of the agents used in the present invention, more preferably in a hydrogel-precursor.
  • the overall level of sequestrant present should be within permitted phosphorus regulations, if relevant.
  • the upper limit to be used is specific to the particular sequestrant.
  • the amount present is preferably up to 1.5 wt%, more preferably up to 1 wt%, most preferably up to 0.8 8 wt%, for example 0.8 wt% of the agent.
  • the sequestrant may be present up to 20 wt%, more preferably 15 wt%, of the agent.
  • the sequestrant is present in any hydrogel-precursor agent.
  • sequestrants for use with the invention are iminodisuccinic acid or its salts and/or DTPA (diethylene triamine pentaacetic acid).
  • Glycerol is found to improve the integrity and hence the peelability and thus removability of a patch formed using the device of the present invention. This is particularly so when the glycerol is in a hydrogel-precursor, as one of the agents.
  • Glycerol may be present at between 0 and 50 wt% of an agent. When present it is preferably found at 2 to 25 wt%, more preferably 4 to 20 wt%, most preferably 6 to 15 wt%, of that agent.
  • the agents of the invention are preferably made up to 100 wt% by water, preferably de-ionised water, typically at levels of 5 to 99 wt% water.
  • Either or both agent may further comprise additional cleaning agents, such as monoethanolamine and triethanolamine, at levels in the range 5-20 wt%, more preferably 5-15 wt%, most preferably 5 to 10 wt%, of the respective component.
  • additional cleaning agents such as monoethanolamine and triethanolamine
  • Either or both agents may further comprise a fragrance.
  • a fragrance in either agent is at a level in the range of 0.1 to 5 wt%, more preferably 0.2 to 4 wt%, most preferably 0.5 to 3 wt%, of the weight of the agent.
  • Dyes can also be added to either or both agent to make a coloured patch.
  • Either or both agents may further comprise additional ingredients, such as antimicrobials (e.g. quaternary ammonium compounds, triclosan, and other phenolic agents such as para-chloro meta xylenol (PCMX), citric acid, lactic acid) and if present, are preferably present in the range of 0.01 to 5 wt% of the agent, more preferably in the range 0.02 to 3 wt%, e.g. at 1 wt% (especially for triclosan); preservatives, e.g.
  • antimicrobials e.g. quaternary ammonium compounds, triclosan, and other phenolic agents such as para-chloro meta xylenol (PCMX), citric acid, lactic acid
  • PCMX para-chloro meta xylenol
  • preservatives e.g.
  • methylparaben, ethylparaben, propylparaben, or mixtures thereof if present, preferably present in the range of 0.01 to 0.5 wt% of the agent, more preferably in the range 0.01 to 0.2 wt%); or film formers such as polyvinyl alcohol (preferably present in the range of 0-50 wt% of the agent where present), polyvinyl alcohol/vinyl acetate copolymers (preferably present in the range of 0-50 wt% of the agent where present), and polyvinylpyrrolidone/vinyl acetate copolymers (preferably present in the range of 0-50 wt% of the agent where present).
  • film formers such as polyvinyl alcohol (preferably present in the range of 0-50 wt% of the agent where present), polyvinyl alcohol/vinyl acetate copolymers (preferably present in the range of 0-50 wt% of the agent where present), and polyvinylpyrrolidone/vin
  • At least one of the agents used in the method of the invention further includes one or more of the following components: (1) a bleach (with or without a bleach activator), (2) an enzyme or enzyme system (including any necessary stabilisers) and (3) at least one surfactant.
  • first and second agents between them contain such components (1), (2) and (3), with (1) and (2) preferably being separated from each other, one in one agent, the other in the other agent.
  • a method of treating a surface employing the apparatus of the first aspect, comprising the steps of delivering from the device a treatment agent onto the surface and pressing the treatment agent against the surface.
  • Preferred aspects of the second aspect are as defined herein for the first aspect.
  • the method includes the step of removing the defining means from the surface, and thus lifting with it the gel patch.
  • the user applies a first agent within the defining means to cover all or substantially all of a stain, and then, preferably within 120 seconds, more preferably within 90 seconds, even more preferably within 60 seconds, most preferably within 30 seconds, e.g. as soon as reasonably practical thereafter, applies a second agent to cover all or substantially all of the first agent, wherein these agents are the agents described hereinbefore, i.e. preferably a hydrogel-precursor agent and a cross-linking component comprising M 2+ ions.
  • a third agent is to be added, this is applied to cover all or substantially all of the second agent, within similar time periods to those noted above, with the overall application of all components being preferably within 180 secs, more preferably within 120 secs, most preferably within 90 secs.
  • the pressing means suitably presses the treatment agent against the surface within 60 secs, preferably within 20 secs, of the completion of the delivery of the final agent. The pressing is carried out to ensure good contact and, in suitable cases penetration, between treatment agent and surface.
  • the agents form a patch which can then be removed by the user.
  • the patch takes between 10 secs and 10 mins to form after application of the final agent.
  • the pressing means is applied for this duration, or for part of it. Formation of the patch may in certain embodiments, particularly when a surfactant is present, be indicated by the development of a white colour.
  • the patch is removed at least 10 secs after application of the final component, more preferably at least 1 min after application of the final component, even more preferably at least 2 mins after application of the final component, yet even more preferably at least 5 mins after application of the final component, most preferably at least 10 mins after application of the final component.
  • the method of the present aspect of the invention may remove or substantially remove many if not all common stains found on textiles and the like, e.g. oxidisable stains, such as coffee, tea and wine stains, proteinaceous stains, together with 'greasy' stains such as those produced by lipstick and the like, grass stains etc.
  • oxidisable stains such as coffee, tea and wine stains, proteinaceous stains, together with 'greasy' stains such as those produced by lipstick and the like, grass stains etc.
  • a subsequent step may be to peel the patch from the surface.
  • the device comprises an actuator in the form of a plunger 416, arranged to slide within a cylindrical barrel 430.
  • the lower end of the cylindrical barrel defines a common circular outlet zone 406, bounded by the free edge 412 of the barrel.
  • Zone 406 forms a defining means, delivering the treatment agents onto the required region.
  • a piston block 434 is also arranged to slide within the barrel 430, below the plunger 416.
  • a piston block 434 mounteded between the plunger 416 and the piston block 434 are two chambers 402, 404, respectively containing first and second liquids.
  • Those chambers are in communication, respectively, with injector pistons 436, 438, the outlet ends of which are slidable within bores formed in upstanding formations 440, 442, in the piston block 434.
  • the ends of those bores are perforated at 444 and 446 so that the first and second liquids can be expelled through the piston block into the common outlet zone.
  • the base of the piston block, formed with the perforations 446, is somewhat concave or domed in shape, to accommodate the patch which will form.
  • the plunger 416 In use, when the plunger 416 is depressed, it first depresses the first chamber 402 and first injector piston 436. The outlet end of injector piston 436 slides down the bore in the upstanding formation 440. In Fig. 2 the injector piston 436 is shown at an intermediate position, in the bore. When it reaches the end of the bore the chamber 402 is compressed, causing discharge of the first liquid, into the outlet zone. In the meantime the second chamber 404 and second injector piston 438 have been undergoing the same movement, but somewhat retarded, such that the second liquid is only expelled into the common outlet zone subsequently. During these operations the plunger is kept pressed down and the piston block is depressed, until it reaches the bottom of the barrel 430.
  • Fig. 3 differs from the embodiment of Figs. 1 and 2 in two significant respects.
  • the actuator includes a plunger 516 this is operated by a trigger lever (coming out from the plane of the drawing, and therefore not shown); and instead of a piston 434, the pressing means is in the form of a flap 550 pivotable about a hinge 560 located substantially at the level of the common outlet zone 580.
  • the flap is operated by mainly pressing a second flap 582, integral with the first flap 550 but transverse to it (the two flaps forming an L-shape), and also pivotable about hinge 560.
  • first liquid is contained within first chamber 584, from which the liquid is sprayed into the outlet zone via its own opening 586 along the arrow A shown in Fig. 3 .
  • second liquid is contained within second chamber 588, from which the liquid passes into the outlet zone via its own opening 590 in the flap 550.
  • the conduit linking the second chamber 588 and the opening 590 is a flexible tube 592 sufficiently long not to hinder the movement of the flap 580.
  • the first liquid may be a calcium chloride solution and the second liquid may be a hydrogel-precursor comprising a sodium alginate.
  • the calcium chloride solution acting as a cross-linking agent for the alginate, may be an aqueous solution of 15% CaCl 2 .2H 2 O, water-like in its flow properties.
  • the hydrogel-precursor comprised: Protanal TM LF20 TM (sodium alginate) 3% Glycerol 8% Dequest TM 2066 (sequestrant) 0.75% Sodium lauryl sarcosinate 4% pH adjusted to 8 with NaOH solution Balance to 100% with deionised water
  • the viscosity of the hydrogel precursor is in the range from 7,000 to 8,000 mPa.s at a shear rate of 1 s -1 at 25°C.
  • the liquids are typically applied to stained fabrics in the following sequence: CaCl 2 solution, followed by hydrogel-precursor; in some cases followed by CaCl 2 solution, using any of the devices described above.
  • Each application is of a similar volume of liquid. Typically there will be an interval of some seconds between the application of liquids.
  • the area is then typically left for 10 mins, after which time the presence of the sodium lauroyl sarcosinate surfactant ensures that the gel patch that has formed has a white colour.
  • the patch is then removed manually by peeling.
  • first and second agents include pH change, in situ generation of bleaching agents, foam or dye formation, fragrance release and heat generation.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Medicinal Preparation (AREA)
  • Cosmetics (AREA)
  • Coating Apparatus (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
EP05008725A 2005-04-21 2005-04-21 Device and method for applying a treatment agent to a surface Revoked EP1714712B1 (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
AT05008725T ATE422973T1 (de) 2005-04-21 2005-04-21 Vorrichtung und methode für das aufbringen einer behandlungsmittels auf eine oberfläche
ES05008725T ES2321003T3 (es) 2005-04-21 2005-04-21 Dispositivo y metodo para aplicar un agente de tratamiento a una superficie.
EP05008725A EP1714712B1 (en) 2005-04-21 2005-04-21 Device and method for applying a treatment agent to a surface
DE602005012802T DE602005012802D1 (de) 2005-04-21 2005-04-21 Vorrichtung und Methode für das Aufbringen einer Behandlungsmittels auf eine Oberfläche
PCT/GB2006/001444 WO2006111754A1 (en) 2005-04-21 2006-04-20 Device and method for applying a treatment agent to a surface
US11/911,443 US20090038082A1 (en) 2005-04-21 2006-04-20 Device and Method for Applying a Treatment Agent to a Surface

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP05008725A EP1714712B1 (en) 2005-04-21 2005-04-21 Device and method for applying a treatment agent to a surface

Publications (2)

Publication Number Publication Date
EP1714712A1 EP1714712A1 (en) 2006-10-25
EP1714712B1 true EP1714712B1 (en) 2009-02-18

Family

ID=34935511

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05008725A Revoked EP1714712B1 (en) 2005-04-21 2005-04-21 Device and method for applying a treatment agent to a surface

Country Status (6)

Country Link
US (1) US20090038082A1 (es)
EP (1) EP1714712B1 (es)
AT (1) ATE422973T1 (es)
DE (1) DE602005012802D1 (es)
ES (1) ES2321003T3 (es)
WO (1) WO2006111754A1 (es)

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US20200157729A1 (en) * 2017-08-07 2020-05-21 Koninklijke Philips N.V. Stain removal device using bleach chemical solution and heat generation

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Also Published As

Publication number Publication date
US20090038082A1 (en) 2009-02-12
ATE422973T1 (de) 2009-03-15
DE602005012802D1 (de) 2009-04-02
ES2321003T3 (es) 2009-06-01
WO2006111754A1 (en) 2006-10-26
EP1714712A1 (en) 2006-10-25

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